The mayavi2 command runs by itself just fine.

The version is 4.4 Build 4

Here's the rest of the traceback:

AttributeError: 'AlgorithmOutput' object has no attribute 'update'
2015-06-09 09:57:07.522 Python[5324:4282982] modalSession has been exited prematurely - check for a reentrant call to endModalSession:
sfepy: point scalars t at [ 0.  0.  0.]
sfepy: range: -2.00e+00 2.00e+00 l2 norm range: 1.06e-02 2.00e+00
Exception occurred in traits notification handler.
Please check the log file for details.Exception occurred in traits notification handler for object: <mayavi.tools.mlab_scene_model.MlabSceneModel object at 0x128fd5ef0>, trait: activated, old value: <undefined>, new value: True
Traceback (most recent call last):
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/traits/trait_notifiers.py", line 520, in _dispatch_change_event
    self.dispatch( handler, *args )
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/traits/trait_notifiers.py", line 483, in dispatch
    handler( *args )
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/sfepy/postprocess/viewer.py", line 1191, in _post_init
    viewer.render_scene(self.scene, viewer.options)
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/sfepy/postprocess/viewer.py", line 668, in render_scene
    self.build_mlab_pipeline(**options)
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/sfepy/postprocess/viewer.py", line 510, in build_mlab_pipeline
    active = mlab.pipeline.set_active_attribute(source)
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/mayavi/tools/pipe_base.py", line 38, in the_function
    factory = factory_class(*args, **kwargs)
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/mayavi/tools/pipe_base.py", line 163, in __init__
    self.set(**traits)
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/mayavi/tools/pipe_base.py", line 180, in set
    self._anytrait_changed(trait, value)
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/mayavi/tools/pipe_base.py", line 198, in _anytrait_changed
    setattr(obj, components[-1], value)
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/mayavi/core/trait_defs.py", line 101, in set_value
    value )
TraitError: The 'point_vectors_name' trait of a SetActiveAttribute instance must be one of [], but a value of '' <type 'str'> was specified.
ERROR:traits:Exception occurred in traits notification handler for object: <mayavi.tools.mlab_scene_model.MlabSceneModel object at 0x128fd5ef0>, trait: activated, old value: <undefined>, new value: True
Traceback (most recent call last):
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/traits/trait_notifiers.py", line 520, in _dispatch_change_event
    self.dispatch( handler, *args )
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/traits/trait_notifiers.py", line 483, in dispatch
    handler( *args )


Dennis


On Tuesday, June 9, 2015 at 10:11:46 AM UTC-7, Dennis Perchak wrote:
Hi,

 I have the Enthought Canopy Python distribution and am new to using SfePy. I was trying to work through the examples and had a problem with viewing the results. The package manager in Canopy already has SfePy Version 2014.4 Build 6. Whenever I try to use the Viewer to look at results, I get:

ERROR:mayavi.core.common:Exception
Traceback (most recent call last):
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/mayavi/core/source.py", line 216, in _handle_children
    obj.start()
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/mayavi/core/filter.py", line 108, in start
    self.update_pipeline()
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/mayavi/filters/set_active_attribute.py", line 133, in update_pipeline
    self._update()
  File "/Users/dennis/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/mayavi/filters/set_active_attribute.py", line 149, in _update
    input.update()
AttributeError: 'AlgorithmOutput' object has no attribute 'update'


I have no idea what the problem is. It happens on my Mac (running Yosemite) and also my Windows 7 machine. 

I would greatly appreciate any help with this.

Thanks.

Dennis